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Ageing of vinyl emulsion paints—an atomic force microscopy study
Author(s) -
de Sá M. H.,
Eaton Peter,
Ferreira Joana L.,
Melo M. J.,
Ramos Ana M.
Publication year - 2011
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3664
Subject(s) - vinyl acetate , emulsion , polymer , atomic force microscopy , materials science , chemical engineering , aqueous solution , polymer chemistry , irradiation , aqueous medium , optical microscope , microscopy , composite material , chemistry , nanotechnology , organic chemistry , optics , scanning electron microscope , physics , engineering , nuclear physics , copolymer
This paper presents a morphological study of poly(vinyl acetate) (PVAc) based films, either cast from polymer solutions or aqueous emulsions, which are widely used in modern and contemporary art, namely as binding media. Different vinyl films were prepared: single polymer, unpigmented and TiO 2 ‐pigmented emulsion films, and subjected to accelerated light ageing. The evaluation of the surface changes of these films, over 3500 hours irradiation under a Xenon lamp (λ≥ 300 nm), was characterized by atomic force microscopy (AFM). The samples studied have suffered minor surface changes and revealed pronounced photostability. The AFM results obtained indicate that the most relevant morphological changes that occurred over time were primarily related to the exudation of surfactants, present in the vinyl emulsions. Copyright © 2010 John Wiley & Sons, Ltd.